*{
    margin: 0;
    padding: 0;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}
html{
    height: 100%;
}
body{
    height: 100%;
}
#app{
    width: 100%;
    height: 100%;
    background-image: url("../img/main.bg.png");
    background-size: 100% 100%;
    position: relative;
}


@keyframes rotate {
    0% {
        transform: perspective(400px) rotateZ(20deg) rotateX(-40deg) rotateY(0);
    }
    100% {
        transform: perspective(400px) rotateZ(20deg) rotateX(-40deg) rotateY(-360deg);
    }
}
.dper-sky {
    position: absolute;
    left: 0;
    top: 0;
    z-index: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
}
.stars {
    transform: perspective(500px);
    transform-style: preserve-3d;
    position: absolute;
    bottom: 0;
    perspective-origin: 50% 100%;
    left: 50%;
    animation: rotate 90s infinite linear;
}

.star {
    width: 3px;
    height: 3px;
    background: #7397a9;
    position: absolute;
    top: 0;
    left: 0;
    transform-origin: 0 0 -300px;
    transform: translate3d(0, 0, -300px);
    backface-visibility: hidden;
}

.star2 {
    width: 3px;
    height: 3px;
    background: #f00;
    position: absolute;
    top: 0;
    left: 0;
    transform-origin: 0 0 -300px;
    transform: translate3d(0, 0, -300px);
    backface-visibility: hidden;
}
.login-container{
    position: absolute;
    width: 500px;
    height: 300px;
    left: calc(50% - 250px);
    top: calc(50% - 150px);
    border-radius: 5px;
    background-color: rgba(47,47,36,.6);
    overflow: hidden;
}
.user-line{
    display: flex;
    width: 400px;
    height: 40px;
    margin-left: 50px;
    margin-top: 50px;
    position: relative;
    box-sizing: border-box;
    border-radius: 5px;
    border: 1px solid transparent;
    border-bottom: 1px solid #484856;
    transition: all .1s;
    overflow: hidden;
}
.user-line > input{
    background-color: transparent;
    width: 100%;
    height: 100%;
    border: none;
    color: #9199aa;
    text-indent: 50px;
    outline: none;
}
.user-line:hover .btn-clear{
    display: block;
}
.user-line-icon{
    width: 26px;
    height: 26px;
    position: absolute;
    left: 5px;
    top: 5px;
    background-size: 100% 100%;
}
.icon-adm{
    background-image: url("../img/adm.png");
}
.icon-pwd{
    background-image: url("../img/pwd.png");
}
.btn-clear{
    position: absolute;
    width: 26px;
    height: 26px;
    line-height: 26px;
    text-align: center;
    right: 5px;
    top: 5px;
    color: #515161;
    display: none;
    transition: color .2s;
}
.btn-clear:hover{
    color: #eee;
}
#btn-login{
    width: 400px;
    height: 40px;
    margin-left: 50px;
    margin-top: 50px;
    background-color: #3a8ee6;
    border: none;
    color: #fff;
    font-size: 18px;
    text-align: center;
    line-height: 40px;
    letter-spacing: 20px;
    cursor: pointer;
    transition: background-color .2s;
}
#btn-login:hover{
    background-color:#8cc5ff;
}
input.invalid:-ms-input-placeholder{
    color: #f56c6c;
}
input.invalid::-webkit-input-placeholder {
    color: #f56c6c;
}
#msg-box{
    position: absolute;
    left: calc(50% - 100px);
    top: calc(50% - 50px);
    width: 280px;
    height: 100px;
    font-size: 14px;
    color: #eee;
    background-color: rgba(0,0,0,.5);
    border-radius: 5px;
    overflow: hidden;
    text-align: center;
    line-height: 100px;
    z-index: -1;
    opacity: 0;
}